package com.daisuxia.web.util;

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.activation.MimetypesFileTypeMap;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;

public class HttpUtil {

	Logger logger = Logger.getLogger(getClass());
	public static HttpUtil httpUtil;
	 public static final String CHARSET = "UTF-8";
	public static HttpUtil getInstance() {
		if (httpUtil == null) {
			httpUtil = new HttpUtil();
		}
		return httpUtil;
	}

	public String doPost(String url, String params)
			throws ClientProtocolException, IOException {
//		logger.info("请求参数:" + params.toString());
		String result = "";
		HttpPost httpPost = new HttpPost(url);
		StringEntity stringEntity = new StringEntity(params.toString(), "utf-8");
		httpPost.setHeader("Content-Type", "text/xml;charset=utf-8");

		httpPost.setEntity(stringEntity);
		HttpClient httpClient = new DefaultHttpClient();
		HttpResponse httpResponse = httpClient.execute(httpPost);
		try {
			BufferedReader reader = new BufferedReader(new InputStreamReader(
					httpResponse.getEntity().getContent(),"utf-8"));
			String resultStr = reader.readLine();
//			logger.info("resultStr=" + resultStr);
			while (null != resultStr) {
				result = resultStr;
				resultStr = reader.readLine();
			}
		} finally {
			httpClient.getConnectionManager().shutdown();
		}
		return result;
	}
	
	/**
     * 扫描图片信息
     * @param urlStr
     * @param textMap
     * @param fileMap
     * @param contentType 没有传入文件类型默认采用application/octet-stream
     * contentType非空采用filename匹配默认的图片类型
     * @return 返回response数据
     */
    @SuppressWarnings("rawtypes")
    public static String formUploadImage(String urlStr, Map<String, String> textMap,Map<String, String> fileMap,String contentType) {
        String res = "";
        HttpURLConnection conn = null;
        // boundary就是request头和上传文件内容的分隔符
        String BOUNDARY = "---------------------------123821742118716";
        try {
            URL url = new URL(urlStr);
            conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(30000);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            conn.setUseCaches(false);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Connection", "Keep-Alive");
            conn.setRequestProperty("User-Agent",
                    "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");
            conn.setRequestProperty("Content-Type",
                    "multipart/form-data; boundary=" + BOUNDARY);
            OutputStream out = new DataOutputStream(conn.getOutputStream());
            // text
            if (textMap != null) {
                StringBuffer strBuf = new StringBuffer();
                Iterator iter = textMap.entrySet().iterator();
                while (iter.hasNext()) {
                    Map.Entry entry = (Map.Entry) iter.next();
                    String inputName = (String) entry.getKey();
                    String inputValue = (String) entry.getValue();
                    if (inputValue == null) {
                        continue;
                    }
                    strBuf.append("\r\n").append("--").append(BOUNDARY)
                            .append("\r\n");
                    strBuf.append("Content-Disposition: form-data; name=\""
                            + inputName + "\"\r\n\r\n");
                    strBuf.append(inputValue);
                }
                out.write(strBuf.toString().getBytes(CHARSET));
            }
            // file
            if (fileMap != null) {
                Iterator iter = fileMap.entrySet().iterator();
                while (iter.hasNext()) {
                    Map.Entry entry = (Map.Entry) iter.next();
                    String inputName = (String) entry.getKey();
                    String inputValue = (String) entry.getValue();
                    if (inputValue == null) {
                        continue;
                    }
                    File file = new File(inputValue);
                    String filename = file.getName();

                    //没有传入文件类型，同时根据文件获取不到类型，默认采用application/octet-stream
                    contentType = new MimetypesFileTypeMap().getContentType(file);
                    //contentType非空采用filename匹配默认的图片类型
                    if(!"".equals(contentType)){
                        if (filename.endsWith(".png")) {
                            contentType = "image/png";
                        }else if (filename.endsWith(".jpg") || filename.endsWith(".jpeg") || filename.endsWith(".jpe")) {
                            contentType = "image/jpeg";
                        }else if (filename.endsWith(".gif")) {
                            contentType = "image/gif";
                        }else if (filename.endsWith(".ico")) {
                            contentType = "image/image/x-icon";
                        }
                    }
                    if (contentType == null || "".equals(contentType)) {
                        contentType = "application/octet-stream";
                    }
                    StringBuffer strBuf = new StringBuffer();
                    strBuf.append("\r\n").append("--").append(BOUNDARY)
                            .append("\r\n");
                    strBuf.append("Content-Disposition: form-data; name=\""
                            + inputName + "\"; filename=\"" + filename
                            + "\"\r\n");
                    strBuf.append("Content-Type:" + contentType + "\r\n\r\n");
                    out.write(strBuf.toString().getBytes(CHARSET));
                    DataInputStream in = new DataInputStream(
                            new FileInputStream(file));
                    int bytes = 0;
                    byte[] bufferOut = new byte[1024];
                    while ((bytes = in.read(bufferOut)) != -1) {
                        out.write(bufferOut, 0, bytes);
                    }
                    in.close();
                }
            }
            byte[] endData = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();
            out.write(endData);
            out.flush();
            out.close();
        	int responseCode = conn.getResponseCode();		
		    if (responseCode==200) {
		    	// 读取返回数据
				StringBuffer strBuf = new StringBuffer();
				BufferedReader reader = new BufferedReader(new InputStreamReader(
						conn.getInputStream(),CHARSET));
				   
				String line = null;
				while ((line = reader.readLine()) != null) {
					strBuf.append(line).append("\n");
				}
				res = strBuf.toString();
				reader.close();
				reader = null;
			}else{
				StringBuffer error = new StringBuffer();
				BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(
						conn.getErrorStream(),CHARSET));
				String line1 = null;
				while ((line1=bufferedReader.readLine())!=null) {
				    error.append(line1).append("\n");
				}
				res=error.toString();
				bufferedReader.close();
				bufferedReader=null;
			}
            System.out.println("返回请求参数" + res);
        } catch (Exception e) {
            System.out.println("发送POST请求出错。" + urlStr);
            e.printStackTrace();
        } finally {
            if (conn != null) {
                conn.disconnect();
                conn = null;
            }
        }
        return res;
    }
    /**
     * 调用 API
     *
     * @return
     */
    public String post(String apiURL, List<NameValuePair> params){
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost method = new HttpPost(apiURL);
        String body = null;
//      logger.info("parameters:" + parameters);
        try {

            // 建立一个NameValuePair数组，用于存储欲传送的参数
//          method.addHeader("Content-type","application/json; charset=utf-8");
//          method.setHeader("Accept", "application/json");
            if (params != null) {
                // 设置字符集
                HttpEntity entity = new UrlEncodedFormEntity(params, HTTP.UTF_8);
                // 设置参数实体
                method.setEntity(entity);
            }
//          method.setEntity(new SerializableEntity(parameters, Charset.forName("UTF-8")));

            HttpResponse response = httpClient.execute(method);

            int statusCode = response.getStatusLine().getStatusCode();

            if (statusCode != HttpStatus.SC_OK) {
                logger.error("Method failed:" + response.getStatusLine());
            }

            // Read the response body
            body = EntityUtils.toString(response.getEntity());

        } catch (IOException e) {
            // 网络错误
            e.printStackTrace();
        }
        return body;
    }
    /**
     * 调用 API
     *
     * @return
     */
    public String postJson(String apiURL, String params){
        HttpClient httpClient = new DefaultHttpClient();
        HttpPost httpPost = new HttpPost(apiURL);
        String body = null;
//      logger.info("parameters:" + parameters);
        try {

            // 建立一个NameValuePair数组，用于存储欲传送的参数
            httpPost.addHeader("Content-type","application/json; charset=utf-8");
            httpPost.setHeader("Accept", "application/json");
            if (params != null) {
                // 设置字符集
                StringEntity stringEntity = new StringEntity(params, "utf-8");
                // 设置参数实体
                httpPost.setEntity(stringEntity);
            }
//          httpPost.setEntity(new SerializableEntity(parameters, Charset.forName("UTF-8")));

            HttpResponse response = httpClient.execute(httpPost);

            int statusCode = response.getStatusLine().getStatusCode();

            if (statusCode != HttpStatus.SC_OK) {
                logger.error("Method failed:" + response.getStatusLine());
            }

            // Read the response body
            body = EntityUtils.toString(response.getEntity());

        } catch (IOException e) {
            // 网络错误
            e.printStackTrace();
        }
        return body;
    }

}
